Diffuser



FIG. 1 is a perspective view of a diffuser according to the disclosure;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The dashed lines shown in the figures are for purposes of illustrating portions of the diffuser and form no part of the claimed design. 

CLAIM The ornamental design for a diffuser, as shown and described. 